The characteristics of lithium-ion batteries and the introduction of charger principles

The characteristics of lithium-ion batteries 1. It has a higher weight-to-energy ratio and volume-to-energy ratio; 2. The voltage is high. The voltage of a single-cell lithium-ion battery is 3.6V, which is equal to the series voltage of three nickel-cadmium or nickel-hydrogen rechargeable batteries; The self-discharge is small and can be stored for a long time, which is the most prominent advantage of the battery; 4. No memory effect. Lithium-ion batteries do not have the so-called memory effect of nickel-cadmium batteries, so lithium-ion batteries do not need to be discharged before charging; 5. Long life. Under normal working conditions, the number of charge/discharge cycles of lithium-ion batteries is far greater than 500; 6. It can be quickly charged. Lithium-ion batteries can usually be charged with 0.5 to 1 times the capacity of the current, so that the charging time can be shortened to 1 to 2 hours; 7. It can be used in parallel at will; 8. Because the lithium ion battery does not contain heavy metal elements such as cadmium, lead, mercury, etc., It has no pollution to the environment and is the most advanced green battery in the contemporary era. Principle of Li-ion Battery Charger Li-ion battery charger is a charger specially used to charge lithium-ion batteries. Lithium-ion batteries have higher requirements for chargers and need to protect circuits. Therefore, lithium-ion battery chargers usually have higher control precision and can charge lithium-ion batteries at a constant current and voltage. The charging process of lithium-ion batteries can be divided into three stages: trickle charging (low-voltage precharge), constant current charging, and constant voltage charging. It should be noted that the charging process of lithium-ion batteries is completely different from that of nickel-cadmium and nickel-hydrogen batteries. It is a complex electrochemical reaction process. Therefore, it is necessary to configure a dedicated charger for charging. Even if it is a dedicated lithium-ion battery charger, because the charging voltage tolerance is very strict (generally 1%), it is necessary to distinguish whether the voltage of the battery is 4.1V or 4.2V when the battery is fully charged. The quality of the charger plays a vital role in the life of the lithium-ion battery. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement.